🔍 Key Concepts

• Identify what type of system is shown overall (look at the compressor, oil separator, and cooler). • Trace the flow into and out of the component labeled E and notice what phase (liquid/gas) is mainly stored there. • Compare the internal baffle and liquid level inside E with what you would expect in a sump or storage receiver.

💭 Think About

• What kind of mixture is leaving the compressor and entering the vertical vessel above E, and what is likely draining down into E from that vessel? • Does the illustration suggest that E is handling very low-temperature (cryogenic) fluids, or is it dealing with lubricating oil used by the compressor? • If another labeled part is clearly providing the main separation function, what remaining, more basic function would E logically provide for the system?

✅ Before You Answer

• Verify whether E is shown with a liquid level and drain at the bottom, typical of a sump or receiver. • Check if any heat‑exchange surfaces (tubes, fins, coils) are drawn inside or around E; this will tell you whether it acts solely as a heat exchanger. • Confirm which labeled component is actually doing the cyclonic separation (look for swirling arrows in a vertical cylinder) so you don’t assign that function to the wrong part.